US3707695A - Infrared intensity detector using a pyroelectric polymer - Google Patents

Infrared intensity detector using a pyroelectric polymer Download PDF

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Publication number
US3707695A
US3707695A US190498A US3707695DA US3707695A US 3707695 A US3707695 A US 3707695A US 190498 A US190498 A US 190498A US 3707695D A US3707695D A US 3707695DA US 3707695 A US3707695 A US 3707695A
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US
United States
Prior art keywords
infrared
intensity detector
infrared intensity
polymer
detector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US190498A
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English (en)
Inventor
Eiso Yamaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Priority claimed from JP9296370A external-priority patent/JPS5112272B1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of US3707695A publication Critical patent/US3707695A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors

Definitions

  • This invention relates to an infrared intensity detector and more particularly to an infrared intensity detector utilizing a pyroelectric polymer compound which has a desirable formability.
  • infrared intensity detectors utilizing pyroelectricity comprise infrared sensitive elements composed of a singleor poly-crystallines of dielectric material having prominent pyroelectric property, such as, lithium niobate, glycinium sulfate lead titanate etc.
  • the sensitive element should be made thinner than about 20pm.
  • the sensitive element should be made considerably wide so as to provide high sensitivity and, in some cases, should be variously formed for the preferred configuration of the detector.
  • the conventional infrared intensity detector using a singleor poly-crystalline of the dielectric material can not be formed to have a sufficient responsiveness or sensitivity.
  • Another object of the invention is to provide an infrared intensity detector having a readily formable infrared sensitive element.
  • Another object of the invention is to provide an infrared intensity detector comprising an infrared sensitive element composed of a pyroelectric polymer compound.
  • Another object of the invention is to provide an infrared intensity detector of a simple construction.
  • the infrared intensity detector according. to the present invention comprises an infrared sensitive thin film composed of a polymer, such as, polyvinyl chloride, polyvinyl fluoride, polyvinylidene fluoride, nylon, all of which have prominent pyroelectric characteristics. These polymer compounds are so readily formable as to be readily formed thinner than pm and sufficiently large.
  • an infrared intensi' ty detector 10 of the present invention which comprises an infrared sensitive element 12 composed of a polymer compound having pyroelectric property.
  • the infrared sensitive film 12 has a thickness preferably below am, so that the element 12 has a sufficiently small heat capacity and therefore has a remarkably quick responsiveness.
  • polymer compounds as above mentioned all are remarkably easy to form and the film 12 is readily formed as thin as above and large enough for a desired area.
  • two electrodes l4 and 14' are disposed which are composed of a material having a small absorption coefficient for infrared ray, for example, gold, nickel, nickel chromium,
  • the electrode 14' is connected through an electrically conductive adhesive agent 16 to one surface of a support member 18 coated with a continuous conductive film 20.
  • the conductive film 20 is preferably made of tin oxide.
  • the other surface of the support member 18 is connected through an electrically conductive adhesive agent 22 to one surface of a metal plate 24.
  • One conductive lead 26 is connected to a suitable portion of the metal plate 24 thereby to serve as one terminal of the infrared intensity detector 10.
  • a second conductive lead 30 is inserted into the bore 28 and fastened to the bore 28 through an insulating filler.
  • One end of the other conductive lead 30 is connected to the other electrode 14 through a wire 32 whereby the second lead 30 acts as the other terminal.
  • the infrared sensitive film or element of the detector of the present invention can be formed desiredly thin and large because of the ready formability of the polymer compound, the detector has sufficient responsiveness and sensitivity.
  • the detector is suitable for mass production because of its simple and compact construction.
  • An infrared intensity detector which comprises:
  • an infrared sensitive film made of a pyroelectrical polymer material
  • two thin electrodes made of a material allowing an infrared ray to penetrate therethrough and disposed on both surfaces of said thin film;
  • a support member composed of an insulating material and having its surface coated with a continuous conductive film which has a surface connected to one of said two thin electrodes through an electrically conductive adhesive agent;
  • a metal plate connected with another surface of said conductive film and having a bore penetrating therethrough;
  • said pyroelectric polymer material is selected from the group consisting of polyvinyl chrolide, poly-vinyl fluoride polyvinylidene fluoride, and nylon.
  • An infrared intensity detector according to claim 1, wherein said infrared transparent material is selected from the group consisting of gold, nickel, nickel chromium and aluminum.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)
US190498A 1970-10-20 1971-10-19 Infrared intensity detector using a pyroelectric polymer Expired - Lifetime US3707695A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9296370A JPS5112272B1 (forum.php) 1970-10-20 1970-10-20
JP9296270 1970-10-20

Publications (1)

Publication Number Publication Date
US3707695A true US3707695A (en) 1972-12-26

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US190498A Expired - Lifetime US3707695A (en) 1970-10-20 1971-10-19 Infrared intensity detector using a pyroelectric polymer

Country Status (6)

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US (1) US3707695A (forum.php)
CA (1) CA938018A (forum.php)
DE (1) DE2152299A1 (forum.php)
FR (1) FR2111720B1 (forum.php)
GB (1) GB1364306A (forum.php)
NL (1) NL7114434A (forum.php)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846820A (en) * 1973-06-26 1974-11-05 Westinghouse Electric Corp Mosaic for ir imaging using pyroelectric sensors in a bipolar transistor array
FR2282628A1 (fr) * 1974-08-23 1976-03-19 Minnesota Mining & Mfg Detecteur directionnel de rayonnements
US4258260A (en) * 1978-05-30 1981-03-24 Kureha Kagaku Kogyo Kabushiki Kaisha Pyroelectric infrared detector
US4300047A (en) * 1979-03-12 1981-11-10 Kureha Kagaku Kogyo Kabushiki Kaisha Method and apparatus for detecting infrared rays and converting infrared rays to visible rays
US4434549A (en) 1980-11-10 1984-03-06 Statitrol, Inc. Method of making an improved pyroelectric sensor
FR2592976A1 (fr) * 1986-01-10 1987-07-17 Thomson Csf Dispositif de detection rapide d'incendie
US4980555A (en) * 1988-10-31 1990-12-25 Honeywell Inc. Electrical interconnector for infrared detector arrays
US5025243A (en) * 1989-05-26 1991-06-18 Nippon Carbon Co., Ltd. Infrared detective element
EP0780914A1 (de) 1995-12-22 1997-06-25 Deutsche Telekom AG Verfahren zur Herstellung einer pyroelektrischen Mischung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574699A (en) 1975-10-10 1980-09-10 Luc Technologies Ltd Conductive connections
JPS54151882A (en) * 1978-05-22 1979-11-29 Kureha Chemical Ind Co Ltd Method of pyroelectrically detecting infrared rays with polyvinylidene fluoride
CA1175130A (en) * 1979-09-25 1984-09-25 Sadao Matsumura Pyroelectric detector and method for manufacturing same
DE3202819C2 (de) * 1982-01-29 1984-12-20 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt Infrarotdetektor und Verfahren zum Herstellen
GB8812954D0 (en) * 1988-06-01 1988-10-05 Emi Plc Thorn Thermal imaging

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587674A (en) * 1950-04-13 1952-03-04 Us Air Force Bolometer
US2981913A (en) * 1957-02-25 1961-04-25 Barnes Eng Co Selective infra-red detectors
US3080542A (en) * 1959-01-02 1963-03-05 Santa Barbara Res Ct Infrared detector and method of manufacture thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587674A (en) * 1950-04-13 1952-03-04 Us Air Force Bolometer
US2981913A (en) * 1957-02-25 1961-04-25 Barnes Eng Co Selective infra-red detectors
US3080542A (en) * 1959-01-02 1963-03-05 Santa Barbara Res Ct Infrared detector and method of manufacture thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846820A (en) * 1973-06-26 1974-11-05 Westinghouse Electric Corp Mosaic for ir imaging using pyroelectric sensors in a bipolar transistor array
FR2282628A1 (fr) * 1974-08-23 1976-03-19 Minnesota Mining & Mfg Detecteur directionnel de rayonnements
US4258260A (en) * 1978-05-30 1981-03-24 Kureha Kagaku Kogyo Kabushiki Kaisha Pyroelectric infrared detector
US4300047A (en) * 1979-03-12 1981-11-10 Kureha Kagaku Kogyo Kabushiki Kaisha Method and apparatus for detecting infrared rays and converting infrared rays to visible rays
US4434549A (en) 1980-11-10 1984-03-06 Statitrol, Inc. Method of making an improved pyroelectric sensor
FR2592976A1 (fr) * 1986-01-10 1987-07-17 Thomson Csf Dispositif de detection rapide d'incendie
EP0234961A1 (fr) * 1986-01-10 1987-09-02 Kidde Dexaero Dispositif de détection rapide d'incendie
US4861998A (en) * 1986-01-10 1989-08-29 Thomson-Csf Rapid fire-detection device for armored vehicles
US4980555A (en) * 1988-10-31 1990-12-25 Honeywell Inc. Electrical interconnector for infrared detector arrays
US5025243A (en) * 1989-05-26 1991-06-18 Nippon Carbon Co., Ltd. Infrared detective element
EP0780914A1 (de) 1995-12-22 1997-06-25 Deutsche Telekom AG Verfahren zur Herstellung einer pyroelektrischen Mischung
US5833833A (en) * 1995-12-22 1998-11-10 Deutsche Telekom Ag Method of preparing a pyroelectric mixture and pyroelectric device

Also Published As

Publication number Publication date
GB1364306A (en) 1974-08-21
CA938018A (en) 1973-12-04
FR2111720A1 (forum.php) 1972-06-09
DE2152299A1 (de) 1972-04-27
NL7114434A (forum.php) 1972-04-24
FR2111720B1 (forum.php) 1975-02-07

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